		@@ -89,67 +89,6 @@ /**

		/**
		* Checks if array starts with a prefix.
		* @param {Array} x source
		* @param {Array} y prefix?
		* @returns {boolean} true if prefix
		*/
		function isPrefix(x, y) {
		var i = 0;
		for(var v of y)
		if(x[i]!==v) return false;
		return true;
		}

		/**
		* Checks if array ends with a suffix.
		* @param {Array} x source
		* @param {Array} y suffix?
		* @returns {boolean} true if suffix
		*/
		function isSuffix(x, y) {
		var i = x.length - y.length;
		for(var v of y)
		if(x[i]!==v) return false;
		return true;
		}

		/**
		* Checks if array contains an infix.
		* @param {Array} x source
		* @param {Array} y infix?
		* @returns {boolean} true if infix
		*/
		function isInfix(x, y) {
		var i = 0, I = y.length;
		for(var v of x) {
		if(v===y[i]) i++;
		else if(i<I) i = 0;
		}
		return i===I;
		}

		/**
		* Checks if array has a subsequence.
		* @param {Array} x source
		* @param {Array} y subsequence?
		* @returns {boolean} true if subsequence
		*/
		function isSubsequence(x, y) {
		var i = 0, I = y.length;
		for(var v of x)
		if(v===y[i]) i++;
		return i===I;
		}

		/**
		* Checks if array has a permutation.
		* @param {Array} x source
		* @param {Array} y permutation?
		* @returns {boolean} true if permutation
		*/
		function isPermutation(x, y) {
		var xa = x.slice.sort();
		var ya = y.slice.sort();
		return compare(xa, ya)===0;
		}

		@@ -156,0 +95,0 @@

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